MCH PARAMETERS
MCH FAULT HISTORY
Parameter 99 - FAULT HISTORY stores the last eight faults that tripped
the drive. The FAULT HISTORY indicates the number of the fault
(number 1 is the most recent fault), the fault message, and the status of
the drive at the time of the fault. An example is shown below:
MCH FAULT MESSAGES
In the example above, the second fault is being viewed, which is an
OVERLOAD fault that ocurred while the drive was accelerating.
QRMH-OBOC
NOTE: Before installing and operating the MCH drive, please
read and become familiar with the MCH Series Installation and
Operation Manual.
NOTE 1: REFER TO THE MCH MANUAL.
NOTE 2: THESE PARAMETERS ARE VIEW-ONLY.
FAULT
NUMBER
FAULT
MESSAGE
DRIVE
STATUS
99 FAULT HISTORY
2 OVERLOAD ACCEL
MCH Series
Quick Reference Guide
FAULT DESCRIPTION
OUTPUT Output transistor fault: Output current exceeded
200%. May be ground fault or short circuit.
LO VOLTS Low DC Bus Voltage fault: DC bus voltage dropped
below 60%. May be low line voltage.
HI VOLTS High DC Bus Voltage fault: DC bus voltage
exceeded 120%. May be overhauling load.
HI TEMP High Temperature fault: Heatsink or ambient
temperature too high.
OVERLOAD Current Overload fault: Output current exceeded
100% for too long. VFD may be undersized.
PWR TRAN Power Transient fault.
PWR SAG Power Sag fault: New control board installed.
Perform factory reset using Parameter 65.
LANGUAGE Language EEPROM fault.
EXTERNAL External fault: TB-13D activated (Parameter 50).
DB ERROR Dynamic Brake fault: DB Resistors overloaded.
CONTROL Control Board fault: Was new software installed?
Perform factory reset using Parameter 65.
INTERNAL Internal fault.
INTERN (#) Internal fault.
FLWR / SER Loss of Follower/Serial fault: 4-20 mA signal at
TB-5B dropped below 2 mA (Parameter 55), or the
serial link was lost (Parameter 56).
NO. PARAMETER
NAME
FACTORY
DEFAULT NO. PARAMETER
NAME
FACTORY
DEFAULT
0 LINE VOLTS AUTO 40 TB5 MAX FREQ 60.00 HZ
1 PRESET #1 20.00 HZ 41 AN INPUT FLTR 0.02 SEC
2 PRESET #2 20.00 HZ 42 TB10A OUTPUT NONE
3 PRESET #3 20.00 HZ 43 TB10A SCALING 60.00 HZ
4 PRESET #4 20.00 HZ 44 TB10B OUTPUT NONE
5 SKIP FREQ #1 .00 HZ 45 TB10B SCALING 125 %
6 SKIP FREQ #2 .00 HZ 47 TB13A INPUT NONE
7 BANDWIDTH 1.00 HZ 48 TB13B INPUT NONE
8 ACCEL RATE 30.0 SEC 49 TB13C INPUT NONE
9 DECEL RATE 30.0 SEC 50 TB13D INPUT EXT FAULT
10 MINIMUM FREQ .50 HZ 52 TB14/RELAY #2 NONE
11 MAXIMUM FREQ 60.00 HZ 53 TB15/RELAY #3 NONE
12 DC BRAKE VOLT .0 VDC 54 RELAY #1 NONE
13 DC BRAKE TIME .0 SEC 55 TB5B LOSS FAULT
14 DYNAMIC BRAKE OFF 56 SERIAL LOSS FAULT
16 CURRENT LIMIT 120 % 57 SERIAL DISABLE
17 MOTOR OVRLOAD 100 % 58 SERIAL ADDRES 30
18 BASE FREQ 60.00 HZ 61 PASSWORD 0019
19 FIXED BOOST (NOTE 1) 63 SOFTWARE VERS (NOTE 2)
22 TORQUE CONSTANT 64 MONITOR MODE ON
23 CARRIER FREQ 2.5 KHZ 65 PROGRAM RESET 60
24 AUTO SOURCE 4-20 MA 66 CLEAR HISTORY MAINTAIN
25 START METHOD NORMAL 70 PID MODE OFF
26 STOP METHOD COAST 74 PID FEEDBACK TB-5B
28 SPEED SRC KEY ENABLED 75 FEEDBACK @ MIN 0.00 %
29 HAND SOURCE KEYPAD 76 FEEDBACK @ MAX 100.0 %
30 CONTROL NORMAL 77 PROPOR. GAIN 5.00 %
31 UNITS spd HERTZ 78 INTEGRAL GAIN 0.0 SEC
32 HZ MULTIPLIER 1.00 79 DIFF. GAIN 0.0 SEC
33 UNITS DECIMAL XXXXX 80 PID ACCEL 30.0 SEC
34 LOAD MULTIPLY 100 % 81 MIN ALARM 0.00 %
35 LCD CONTRAST MED 82 MAX ALARM 0.00 %
36 SLEEP THRSHLD .00 HZ 98 LANGUAGE ENGLISH
37 SLEEP DELAY 30.0 SEC 99 FAULT HISTORY (NOTE 2)
39 TB5 MIN FREQ .00 HZ
